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When I try to start Firefox nothing happens

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I updated to 3.6 beta 4 and it started after the installation but the next time I tried to run it nothing happened other than the hour glass for a second or two. I rebooted no change. I uninstalled it and downloaded and installed 8.0 and still nothing happens. I tried updating to the beta version again but it still doesn't work.

I updated to 3.6 beta 4 and it started after the installation but the next time I tried to run it nothing happened other than the hour glass for a second or two. I rebooted no change. I uninstalled it and downloaded and installed 8.0 and still nothing happens. I tried updating to the beta version again but it still doesn't work.

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3.6 Beta 4 looks like you are using an outdated version of firefox, run clean install of Firefox 8 and try